DALTON TRANSACTIONS
·
2023
·
IF 4
Yi Shui,Zhengli Liang,Zhenhua Li,Jiahao Wan,Lehui Liu,Xingxing Jiang,Zheshuai Lin,Hongming Liu
Exploring feasible tactics to induce the formation of non-centrosymmetric (NCS) structures, especially from centrosymmetric (CS) structures, is essential for the development of nonlinear optical crystals with more potential. An NCS alkali metal-containing molybdenum iodate hydrate, namely, NaMoO3(IO3)(H2O), was designed based on the CS matrix NaMoO3(IO3) via introducing a water molecule into the structure. The introduction of one crystalline water molecule results in the rearrangement of Λ-shaped cis-[MoO4(IO3)2] units, and the proper array of the cis-[MoO4(IO3)2] units in NaMoO3(IO3)(H2O) results in its strong SHG response of 4.6 × KH2PO4. In addition, NaMoO3(IO3)(H2O) exhibits a wider optical bandgap of 3.44 eV and a larger birefringence of 0.231 than its matrix. Furthermore, the framework of NaMoO3(IO3)(H2O) is highly similar to that of α-KMoO3(IO3), with water molecules assisting Na+ cations in occupying the position of K+. However, due to the extra hydrogen bond of water molecules, the [MoO3(IO3)]∞ layers in NaMoO3(IO3)(H2O) retain a parallel-stacking arrangement, different from the antiparallel arrangement of layers in α-KMoO3(IO3) with a centric structure. This study confirms the feasibility of applying a water molecule to adjust the orientation of basic building block units to assemble an NCS structure based on CS crystals.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Binhua Mei,Ju Bai,Yuhang Zhang,Yang Ma,Yanjun Hou,Shuhong Wang,Cheng Wang
Low-band gap semiconductor polymer materials play a crucial role in the field of organic optoelectronics. In this context, a series of low-band gap polymers containing thienopyrazine as the acceptor and cyclofluorene–bithiophene as the donor were synthesized and utilized in resistive random access memory (RRAM) devices. These memory devices consistently exhibit nonvolatile flash memory behavior. Remarkably, all three polymers demonstrate stability even after 1000 cycles without significant fluctuations. Notably, the three polymer-based devices also exhibit excellent ternary memory performance, with current ratios of 1:10 2.8 :10 4 , 1:10 1.3 :10 3.9 , and 1:10 1.8 :10 3.6 . Furthermore, the photoelectric properties of the three polymers and the conduction mechanisms of the memory devices were thoroughly discussed.
研究领域:
有机光电子学
·
材料科学
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半导体器件
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yunchao Ma,Yuxin Yao,Shengnan Qi,Chuanxue You,Yuanyuan Wu,Chunbo Liu,Bo Hu,Keyu Cui
Herein, we successfully synthesized two photoactive donor–acceptor (D-A) covalent organic frameworks by incorporating electric-deficient triazine and electric-rich benzotrithiophene moieties into the framework. The introduction of sulfur atom and triazine unit significantly change the intrinsic band gap of JLNU-COFs, this leads to an expanded range of light absorption, encompassing wavelengths from ultraviolet to visible. The narrow band gap of JLNU-311 allows for efficient utilization of visible light while maintaining the thermodynamic activity required for nitrogen reduction within appropriate energy bands. JLNU-311 modified with strong electron absorbing groups has higher activity to NH 3 production without co-catalyst or sacrificial agent, and yield can reach 325.6 µmol/g/h. Theoretical calculation further confirm that acceptor structure can effectively regulate the band gap width, promote the adsorption, dissociation and protonation of N 2 molecules on JLNU-COFs, and thus reduce the energy barrier of photocatalytic nitrogen reduction reaction (PNRR). Therefore, this study provides an effective strategy for design of active nitrogen fixing photocatalysts.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yali Song,Ziyan Li,Shuaibin Li,Cairong Yang,Long Huang,Xiaojing Zhang,Qiong Wang,Hongzhong Zhang
Holes and O 2 − have been proved the primary species for sulfamethoxazole (SMX) degradation in g-C 3 N 4 photocatalytic system. On the basis, P doped g-C 3 N 4 (PCN) photocatalyst with midgap states was prepared by the polymerization of urea and etidronic acid, in order to enhance the role of main species in SMX removal via tailoring band gap structure. Compared with g-C 3 N 4 , the energy gap, CB position and VB position of PCN change little, however, PCN shows lower recombination efficiency of photogenerated carriers, strong adsorption and harvest of more visible light due to the midgap states induced by P doping, which is favorable to improve the photocatalytic activity. When the additive amount of etidronic acid is 0.03 g for 10 g urea, the obtained PCN-0.03 exhibits excellent visible-driven photocatalytic ability on SMX degradation. The kinetic constant is 2.1 times than that of pure g-C 3 N 4 . Electron spin resonance tests and trapping experiments imply that OH, holes and O 2 − are produced and enhanced by PCN-0.03 under visible light in comparison with g-C 3 N 4 . Holes and O 2 − take the primary role in SMX photodegradation . The detailed and systematical work may provide an effective strategy for water purification , especially containing SMX.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Limeng Zhang,Yanlong Xia,Zhigang Che,Boxin Jiao,Xu Wang,Jiacheng Shang,Yurong Zhou,Fengzhen Liu
Tin dioxide (SnO2) has emerged as a highly promising candidate for electron transport layers in perovskite solar cells. However, defects in the SnO2 film and at the interface between SnO2 and perovskite often cause serious nonradiative recombination, resulting in the deterioration of the performance of perovskite solar cells. Herein, a synergistic passivation strategy is employed through the introduction of amphiphilic fluorosurfactants (FS-31) into the SnO2 precursor solution, enabling the passivation of defects present both in the SnO2 film and at the interface between SnO2 and perovskite. Moreover, FS-31 is capable of modulating the energy level of the SnO2 film and enhancing the crystalline quality of the wide-band-gap perovskite, thereby minimizing residual lead iodide. Thanks to the positive effects of FS-31, the n–i–p type wide-band-gap perovskite (1.68 eV) solar cells achieve a champion power conversion efficiency (PCE) of 20.92%, an open circuit voltage (VOC) of 1.24 V, and a minimal VOC deficit of 0.44 V. Furthermore, this simple strategy provides strong support for the preparation of high-efficiency n–i–p perovskite/silicon tandem solar cells.
研究领域:
光伏技术
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材料科学
·
可再生能源
·
半导体器件
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Microstructures
·
2025
·Vol. 5
·期 1
·N
·
IF 9
Xinjian Li,Xiaohuan Luo,Moran Wang,Tu Lyu,Chaohua Zhang,Fusheng Liu,Hongan Ma,Lipeng Hu
In thermoelectrics, optimizing both carrier and phonon transport is crucial for enhancing thermoelectric performance. Strontium titanate, a representative N-type oxide thermoelectric material, often exhibits inferior figure of merit (zT) due to its large band gap that limits carrier concentration, and high lattice thermal conductivity, attributed to strong Ti-O covalent bonds. Conventional approaches, such as aliovalent doping to increase carrier concentration or introducing structural defects to reduce lattice thermal conductivity, are insufficient as they fail to decouple the interdependent electrical and thermal properties. Herein, we introduce a high-pressure synthesis technique that concurrently modulates both the band gap and microstructure. This approach effectively enhances the carrier concentration by narrowing the band gap and increases the effective mass of the density of states through enhanced solubility limit of rare earth elements, significantly improving the power factor. Additionally, high-pressure condition induces microstructural defects, including point defects, dislocations, lattice distortions, and nanoscale grains, which promote broad-wavelength phonon scattering and minimize lattice thermal conductivity. Consequently, a peak zT value of 0.25 at 973 K is attained in high-entropy (Sr0.2La0.2Nd0.2Sm0.2Eu0.2)TiO3 synthesized at 5 GPa, representing a 5.3-fold improvement over undoped strontium titanate. This work highlights the pivotal role of high-pressure synthesis in decoupling the carrier and phonon transport in thermoelectrics.
研究领域:
材料科学
·
凝聚态物理
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lichen Zhang,Xing Su,Shuo Wang,Xiaodong Li,Meishuai Zou
Fluoride coating can reduce the ignition temperature, enhance the burning rate and inhibit the agglomeration of aluminum powder. However, the addition of non-energetic fluoride can reduce the energy of aluminum powder. In this study, for the first time, 3-Perfluorohexyl-1,2-epoxypropane (PFHP) was coated on the surface of aluminum powder, which reacted with glycidyl azide polymer (GAP) in situ to form core–shell Al@PFHP@GAP. Compared with raw aluminum powder, Al@PFHP@GAP not only significantly reduced ignition temperature (about 150 °C), but also greatly improved the combustion efficiency (from 87.7% to 97.6%). Besides, the heat of combustion was also greatly increased by 6.3%, compared with that of raw aluminum powder. Such performances were outstanding among the existing coated Al. In addition, the formation of coating shell effectively improved the hydrophobicity and corrosion resistance of the aluminum powder. In a word, our derived Al@PFHP@GAP provided a novel rationale for aluminum powder with greatly enhanced combustion performance.
研究领域:
材料科学
·
高能材料
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2026
·
IF 14.2
Xiaoyuan Zhang,Yuchen Gu,Tiantian Xiang,Fengmei Su,Yuezhan Feng,Youxin Ji,Jianzhu Ju,Chuntai Liu
Radiative cooling textiles offer a promising approach for personal thermal management, yet conventional single-layer designs often fall short in achieving effective temperature regulation. To overcome this limitation, a Janus-structured PVDF-HDPE/BN textile was prepared via functional group matching and hierarchical structural regulation. The optimized textile, fabricated with 12 wt% PVDF, exhibits outstanding spectral selectivity, with a solar reflectivity of 93.24% and an atmospheric window emissivity of 98.45%, enabling highly efficient sunlight reflection and radiative heat dissipation into outer space. Furthermore, the incorporation of high thermal conductivity h-BN into the bottom layer enhances the in-plane thermal conductivity, facilitating quickly transfer of body heat to the top PVDF radiation cooling layer and thereby enhancing the efficiency of the cooling efficiency. For the personal thermal management applications, the 12PVDF-HDPE/BN textile achieves a daytime temperature reduction of up to 7.59 °C. When applied to the building exteriors, it attains a cooling effect of 9.7 °C under outdoor conditions, with performance further strengthening under increased solar irradiance. In addition, the composite textile demonstrates excellent moisture-wicking and breathability, promoting convective heat convection and enabling more efficient body cooling efficiently. This work provides a scalable and multifunctional material strategy for next-generation radiative cooling textiles suited for both personal and architectural applications.
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2022
·Vol. 16
·期 12
·2200473
·
IF 10.947
Shuai Huang,Mengmeng Shang,Yu Yan,Yining Wang,Peipei Dang,Jun Lin
Phosphor-converted white light-emitting diodes (WLEDs) are extensively spread to every part of our daily life and trigger urgent needs for discovery of phosphors without cyan gap (spectral missing in the 480–520 nm range) in pursuit of “human-centric” sunlight-like full-spectrum lighting. Here, a new ultra-broadband green-emitting K 3 La(PO 4 ) 2 :Eu 2+ phosphor is reported to meet this challenge. An efficient and positive double-heterovalent substitution strategy is proved in K 3 La(Ca/Sr/Ba)(PO 4 ) 2 :Eu 2+ by the evidence of enhanced quantum yield, improved thermal stability, and the tunable luminescence color. The luminescence mechanisms are revealed in this paper. Fabricating a dichromatic 370 nm-UV chip pumped WLED using K 3 La(Ca)(PO 4 ) 2 :Eu 2+ along with a commercially available red phosphor shows a continuity spectrum comparable to the solar spectrum with excellent CIE color coordinates of (0.350, 0.347), low color-correlated temperature of 4853 K, and high color rendering index (Ra) of 96. It is shown that the double-heterovalent substitution contributes to designing and optimizing phosphors for full-spectrum WLEDs.
研究领域:
材料科学
·
光学材料
·
固态照明
·
光子学
·
发光材料
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Jing Li,Baodan Liu,Aimin Wu,Bing Yang,Wenjin Yang,Fei Liu,Xinglai Zhang,Vladimir An,Xin Jiang
Photoelectrochemical water splitting has emerged as an effective artificial photosynthesis technology to generate clean energy of H2 from sunlight. The core issue in this reaction system is to develop a highly efficient photoanode with a large fraction of solar light absorption and greater active surface area. In this work, we take advantage of energy band engineering to synthesize (GaN)1–x(ZnO)x solid solution nanowires with ZnO contents ranging from 10.3% to 47.6% and corresponding band gap tailoring from 3.08 to 2.77 eV on the basis of the Au-assisted VLS mechanism. The morphology of nanowires directly grown on the conductive substrate facilitates the charge transfer and simultaneously improves the surface reaction sites. As a result, a photocurrent approximately 10 times larger than that for a conventional powder-based photoanode is obtained, which indicates the potential of (GaN)1–x(ZnO)x nanowires in the preparation of superior photoanodes for enhanced water splitting. It is anticipated that the water-splitting capability of (GaN)1–x(ZnO)x nanowire can be further increased through alignment control for enhanced visible light absorption and reduction of charge transfer resistance.
研究领域:
材料科学
·
可再生能源
·
纳米技术
·
光电化学
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Hongbing Song,Lei Liu,Haozhong Wang,Bingxiao Feng,Meng Xiao,Yubao Tang,Xiaofei Qu,Hengjun Gai,Tingting Huang
The development of a photocatalyst with high activity, large specific surface area and precise band gap adjustment is the focus of the field of photocatalysis in realizing energy conversion and improving environmental issues. In this paper, a simple synthesis process for co-doping of KCl and NH 4 Cl to precisely adjust the band gap of g-C 3 N 4 was developed. Various characterization results show that doping with KCl and NH 4 Cl can reduce the band gap of the carbon nitride , increase its visible light absorption, improve its carrier separation efficiency, thus showing good photocatalytic activity . Cl and K enter the g-C 3 N 4 layers via intercalation and form a dual-element charge transport channel between these layers, thereby facilitating the transport of electrons. The introduction of NH 4 Cl increases the specific surface area of the composite, thus providing abundant adsorption and reaction sites. The co-loaded photocatalyst CN-NH 4 Cl-0.05KCl was used to degrade rhodamine B (RhB) and tetracycline (TC) and showed excellent photocatalytic activity. A possible mechanism of photocatalytic degradation is proposed based on the analytic results.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Jiajia Shan,Xinjing Li,Shuqing Han,Tao Ren,Mengke Jin,Xue Wang
Surface Enhanced Raman Spectroscopy (SERS) is a highly sensitive detection method, however, it is still challenging to directly detect florfenicol due to its low Raman activity. To solve this problem, we present a novel sensor for selective detection of florfenicol residue in milk using gap-enhance Raman tags (GERTs) competitive immunoassay. In this nanosensor, Raman reporters 4-mercaptobenzoic acid (4MBA) were embedded in the 1 nm gap of Au core-gap-Au shell nanoparticles, which can protect 4MBA molecules from unwanted external environments and provide a high enhancement. The parameters affecting the detection sensitivity were discussed and optimized. The limit detection of florfenicol in milk can reach 0.1 μg/kg. To evaluate the performance of GERTs immunoassay, [email protected] tags immunoassay was conducted and the results were compared. Moreover, Raman mapping was investigated to improve the quantitative prediction model with R 2 of 0.981 achieved, by eliminating the signal fluctuations caused by the inhomogeneous distribution of GERTs.
研究领域:
分析化学
·
纳米技术
·
食品安全
·
光谱学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）